Home / 20,960.31-28,925.79-11,529.12

Finding the Fourth Proportional to 20,960.31, 28,925.79 and 11,529.12

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Solution

The fourth proportional to 20,960.31, 28,925.79 and 11,529.12 is: 15,910.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,960.31 : 28,925.79 = 11,529.12 : x
  2. Step 2: Convert to fraction form
    20,960.31/28,925.79 = 11,529.12/x
  3. Step 3: Cross multiply
    20,960.31x = 28,925.79 × 11,529.12
  4. Step 4: Simplify right side
    20,960.31x = 333,488,904.00
  5. Step 5: Solve for x
    x = 333,488,904.00/20,960.31
  6. Step 6: Final answer
    x = 15,910.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.